<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 添加用户按钮 -->
    <el-button type="primary" round>添加用户</el-button>

    <!-- 角色主体区域 -->
    <el-table :data="tableData" style="width: 100%" border>
      <!-- 左侧可展开区域 -->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row
            :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
            v-for="(item1, i1) in scope.row.children"
            :key="item1.id"
          >
            <!-- 渲染一级权限 -->
            <el-col :span="5">
              <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 渲染二级和三级权限 -->
            <el-col :span="19">
              <!-- 通过 for 循环 嵌套渲染二级权限 -->
              <el-row
                :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                v-for="(item2, i2) in item1.children"
                :key="item2.id"
              >
                <el-col :span="6">
                  <el-tag
                    type="success"
                    closable
                    @close="removeRightById(scope.row, item2.id)"
                  >{{item2.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <el-col :span="18">
                  <el-tag
                    type="warning"
                    v-for="(item3) in item2.children"
                    :key="item3.id"
                    closable
                    @close="removeRightById(scope.row, item3.id)"
                  >{{item3.authName}}</el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>

          <!-- <pre>
              {{scope.row}}
          </pre>-->
        </template>
      </el-table-column>
      <!-- 角色主体区域 -->

      <el-table-column label type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" prop="desc">
        <template slot-scope="scope">
          <!-- 操作按钮区域 -->

          <el-button type="primary" icon="el-icon-edit">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete">删除</el-button>
          <el-button type="warning" icon="el-icon-star-off" @click="Fenpeiquanxian(scope.row)">分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="FPdialogVisible"
      width="30%"
      @close="setRightDialogClosed"
    >
      <el-tree
        :data="rightsLis"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        :props="treeProps"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="FPdialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 权限列表数据
      rightsLis: [],
      // 数据列表数据
      tableData: [],

      //  分配权限弹出默认值
      FPdialogVisible: false,
      //树形结构的属性绑定
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      //默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getjiaose()
  },
  methods: {
    //   获取数据列表
    async getjiaose() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.$message.success('获取角色列表成功')
      this.tableData = res.data
      console.log(res)
      this.newarr = res.data
    },
    // 删除用户权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }

      // this.getRolesList()
      role.children = res.data
    },
    // 分配权限的处理函数
    async Fenpeiquanxian(role) {
      this.roleId = role.id
      this.FPdialogVisible = true
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限列表失败')
      }
      this.$message.success('获取权限列表成功')
      this.rightsLis = res.data
      console.log(res)
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击确认分配权限列表
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)
      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功')
      this.getjiaose()
      this.FPdialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>